Throttle-valve.



J. s. CHAMBERS. THROTTLB VALVE.

APPLIOATIOH FILED MAY 28. 1906.

.J l, L. en m. w95/ @MHH A 3. GHMBERS. TEEO'FTLBY VLVE.

AA.'E'PI.|X(LATIH FILED HAY 26,1009.

Patmltec Mar. 22, 19M

2 SHEETS-SHEET 2 concern:

Be 1t known that I JOHN S. CHAMBERS, a itactwith the open lower end of the stand citizen ofthe United States and resident of i pipe by means of keys 12 and 13'- passing; Rocky ount, in the county of Ldgecombe through slots in the branches 6 and 7 and and State of North Carolina, have invented engaging the upper walls o the lugs l0 @o a ynew and useful Throttle-Valve, of which and l1. the followin is a specification. The throttle valve is of a well known type, My invention relates to throttle valves and ieupper section being denoted by le and i more particul-arl f to means for operating the arrangedto seat on the valve seat l5 atthe valve from the cab or back end of the locotop ofthe stand pipe and the lowerv section, e5 v mdtive boiler and for indicating accurately denoted by 1.6, being of the piston type the extent of valve opening. and sliding` within the valve seat 17, rllhe f practical embodiment of my invention ower section 16 telescopes on the reduced is represented in the accompanying drawower end of the section 14e and 1s peinntted llings in which, a slight movement relative to the section'o Figure l is aplongitudi'nal'vertical section 14e before the section 14- is lifted, this prethrough a portion of a locomotive 'boiler liminary movement serving to lift the small steam dome and stand pipe, showing the arauxiliary valve 18 from-its seat and permit rangement of the valve opelatino means, steam to enter theinterior chamber 19 within 20 Fig. is a partial back end view of the the stand pipe as well as beneath the valve oilei, showin@ that portion ofthe valve opseetion 16 to balance the valve before the eiatmg means which is exposed for manlpusection le is lifted to admit steam into the ating the valve, Fig. 3 is a top plan view chamber' 2O within the stand pipe and thence ofthe same, Fig. et is a si e view of the same, to the steam pipe Il. The valve rod 21 ex- 25 Fig; 5 is a transverse vertical section through .`tend s downwardly within the interior chamtlie stan pipe, in the plane of the line A-TA er 19 and is connected by a short crank 22 of Fig. l, 1`ig. 6 is a view in detail in longiwith a rock shaft 23 which extends horizontudinal section ofthe hub ofthe operating` ta v through the lwall of the stand pipe crank, Fig. 7 is a View in detail of the right and rearwardly within the boiler l, through and lett hand screws which cooperate with the back end of the boiler where' the said 85 the hub of the operating crank, Fig. 8 is a rock shaft is provided with a short `crank v similar view showing' the hub of the crank 2e of the same length as the crank 22, the and the right and left screws in coperative free end of the crank 24 being connected by re ation toone another, Fig. 9 is an enlarged 1 a transverse operating rod 25 o the operatvieu in detail, showin0 in longitudinal secing crank v26 as will hereinafter more par-y 90 tion through the end stop for the rock shaft ticularly appear. i he rock shaft 23, which transmits motion to the valve rod, and throughout that portion. which extends along Fig. l() 1s a similar view showing the couJ- within the boiler l., is housed steam-tight ling for securing the shaft casing to the within a tubular casing- 2T. "his casing 27 40 stand pipe. l is coupled to the projecting end of a nipple 95 vThe boiler is denoted by l, the steam dome 8 set in the wall ot the stand pipe, the said )y 2, the stand pipe by 3, and the steam pipe coupling being located neai. the wall of the j stand pipe where it may be manipulated .My present invention provides for operthrough the `top of the dome 2 when, for

4iinrrian ,s'rnrns JoHN s.

ramene CHAMBERS, OF ROCKY MOUNT, ORTH CAROLINA.

rHnoT'rLe-vanva.

Specification of Letters Patent. Pgmmmd Mlfqlg Application led May 26, 1909. Serial No. 498,462.

todraw the steam pipe into 2E, MMU?.

To allah/om it may steam-tight conany cause, it m making an opening in the n stand pipe, without disturbing the shaft ome To this end the stand pipe 3 is su casingr 27 at the back end of the boiler. The

isheld fast ported on the steam pipe 4: and coupling' in the i: present instance consists thereto in the )resent instance b a stra o of a v'land 29 screwed on to the hollow n1 l J y a P which passes ple 28, and provided witl and up on opposite sides ofthe stand ipe a gland 3l screwed lon to the end or' the 3, the branches 6 and of the strap extendeasing` 27 and provided with an enlarged ingthrough perforations S and 9 in lugs l0 screw-threaded portion 32 and a coupling and ll formed on vtheopposite sides of the nut provided with an interior projecting stand pipe. Strain is exerted upon the strap :flange 4 'or engaging; the

ay be desired to remove the 1 a shoulder 30, 1405 shoulder 30 on 1.10

' 44 which corresponds the tace of the is forced against the flat tace ot the tapered -duce Wedgedilre joint between the two.

lvided with an exterior screw-thread 88 for back end of the boiler l..

vthe point where the the screw 50.

dal@

the gland 29, and thereby drawing the gland 3l into steam-tight contact iviththe gland 29a and at the same time closing the 'joint circuinterentially between the tivo glands. The glands E29 and 3l are preferably provided with oblique engaging 'facce to prolhe opposite end of the casing;` 2'( is enteriorly 'screw-threaded, as shown at 35, and slightly tapered to engage the interior screw-thread 36 on the stem ot the gland 37, the said stem ot the gland being prothe Wall 39 at the 5in additional packing plate l0 rests in close contact with the interior tace of the Wall 39 to give additional support to the screwdghreaded stein ot' the gland 37 and increase 'the extent of the joint, to make it steam-tight.

It Will 'he noted that the casing 27 is screwed Within the stem ol the gland 37, at stem of the glandv is screwed into the Wall 39 so that the Wedging effect of the tapered screw will not spread the hollow stein oit the gland, however tight it may Wedge by screwing; the gland in place. The gland 37 is provided with an interior shoulder 4l and the (3o-acting gland '42 is provided with a reduced and interiorly tapered extension 43 which telescopes within the gland 8T. The rock sha-tt 33. is provided Within the gland? ivith'a taper-ed flange to the ta ered interior of the gland 37 and within the coperating gland 4Q around the shaft QSand against flange 44 there is located a other metal packing 45 which screwing the gland 4into Babbitt c flange 44 by the bolts and 47 which 'torce the lgland 42 toward' the gland 37. This metal packing 45 receives the endivisc thrust `gageinent with the screws of the shaft 23 when steamv is admitted into the interior chamber 19 W1thin the stand v pipe, producing an ell'ective and steam-tight end stop the shalt7 and to lm'tlier hold the shai't 23 in contact with the stop 45, a coil spring/1:8 is introduced between the back of the gland 42 and the hub oit the crank The operating rod 25, which is connected to the tree end of the crank Q4. is supported at its end opposite the crank 24, by a bracket 49 `fastened to the end oit the boiler. The bearing'tor the rod Q5 is provided or'by a hollow screiv 50, provided with an extended exteriorly screw threaded@ neck 51 which screws intothe brochet eligand receives on its outer end a' clamp nut 52 to hold 'it in y position. The operating rod 25 is provided with a reduced end 58 which passes longi tudinally through the screw 50 and has a free longitudinally sliding movement Within At its extreme outer end, the

reduced lportion 53 is provided with a series or annular grooves or marks 54 which are used to determine the amount of opening olv the throttle valve, as will' hereinafter appear. The operating rod 25 also has secured thereon a short screw 55, leaving a short distance between the two screws 55 andV 50, the 7 two screws 55 and 50 beingthe vone right hand and the other left hand screw-threaded. The two Iscrews 55 and 50 arel engaged by the interiorly right and left hand screw threaded hub 56 of the operating crank 26.7 The huh 56 is here shown a split hub,tl1e parts oit which are drawn into operative 'en- 55`andf50 lby means et a bolt 5'? passingk through lugs on the heb, located on oppositesides ot the slot.- ln operation, when it isdesired to open the throttle.) the crank Qdisturnedtovvard the. direction shown in'dotted linesglgig 4, the result bein to move the-'crank bodily toward the end ol thejbracket 49 by lthe engagement ot its hub with thestationary screw 50, and thereby draw the screw 55 and operating rod 25 vto theright, as the draW- ing is shown, and simultaneously'therewith to dravv the screw 55 and hencejthe operating rod Q5, to the right, thereby'rapidly sliding the rod 25 through the hollow stationary screw 50, causing its end to' project beyond the outer face of the jam nut 52. lhe number ot annular marks or grooves 54 which are brought 'into vievv beyond the outer face ofthe nut 52, will determine accurately 'the -opening of the throttle valve, since the distance between two consecutive annular grooves "or ina-rhs` is accurately made to correspond to a certain extent of opening ofthe valve; tor instance, the distance between two consecutive grooves may indicate an opening` of` the throttle valve one-eighth of an inch. j Therelore. it the operating crank 26 be turned until iour ot these grooves project, the throttle valve will he opened' one-half inch. These figures are taken merely as illustrative, it being evident that the distance between tvvo consecutive grooves may be made to repre4 sent any desired opening; of' the throttle.

The manner in which the screws 55 and 5() are secured and the manner in which they coperate with the hub 56 ot the operating crank cause the valve to open. twice as rapidly for a given extent of movement of the operating rod as it would if a single screw were employed having the same pitch,` since1 tl1e `operatingY crank' moves bodily. drawing' the operating rod with it,' and vat, the same time causes the operating rod to longitudinally move inthe same directionv relative to the hub of the crank.

The roch shaft E28 may be withdrawn through the bach' ond of the boiler without the valves may also be withdrawn from the top of thev stand pipe through the top of the dome, v Without disturbing the casing7 bysliding the il essere rock shaft out of engagement with the crank on the valve rod 21; and the stand pipe itself may be removed, without disturbing the casing, by withdrawing the shaft 23 and within the interior chamber within the stand pipe and within'the steanitiglit eas-v ing connecting this interior chamber .with the back end of the boiler and the rock shaft which communicates motion from the operating rod to the valve rod may be `removed if occasion requires while steam is on within the boiler, l

A small drain and test valve 58 is conveniently set in the Wall of the gland 37 at the back end of the boiler.

llt is obvious that the wallof the stand pipe may be tapped for the shaft and nipple 28, at a point higher than that shown,

if -it be desired to lower the standpipc Within the dome or to suit a lower dome, and that other changes might be resorted to without departing from the spirit and scope of my invention; hence ll do not wish to limit myself strictly to the structure herein set forth, but

lhat 1 claim is:

l. ln a locomotive boiler provided with j a steam dome and stand pipe extending from a point `within the boiler up into the steam dome, a steam conduit leading from the stand pipe, a throttle valve in the stand pipe, a roclr shcft extending along within the boiler from within the stand pipe to the rear end of the boiler, a connection between the valve and the shaft within the stand pipe and means foi` operating the Ashaft at the rear end of the boiler. y

2. In aflocomotive boiler provided with a steam dome ,and a stand pipe extending from within the dome to a point within the body of the boiler, extending from the stand pipe along Within the l oiler to the rear head thereof, a throttle valve inw-the stand' pipe, a rock shaft extending along within the housing, a valve rod connecting the valve with the shaft-withinthe stand ipe and means for operating. the shaft and ence the valve.

3. The combination with a `locomotive boiler, its steamdome and stand pipe, of a throttle valve, a valve rod extending down Within the stand ipe, a rock shaft extending from within t e stand pipe through the throttle valvcfof a valve rod within the back end ofthe boiler, the back end of the boiler and 4cranks conand operating rod. l

el'. The combination with a locomotive. boiler. its steam dome, a stand pipe and a Ameeting. the rock shaft with the valve rod stand pipe, a rock shaft extending from within the stand pipe lthrough the backend 4the roclr shaft at the baolr a steam-tight housing ,forni an end stop for the an operating rod at ldonoeand a throttle valve in the stand pipe,

of a roel; shaft extending -from within the stand pipe through the back end of the boiler, a steam tight housing for the rock shaft extending from the stand pipe to the back end of the boiler and provided with a coupling near the stand pipe, means for connecting the roch shaft with the throttle valve and means for operating the roch shaft.. 'i i (i. ln a loeoi'notive boiler, the combination with the stand pipe, the 'throttle valve therein and a roclr shaft connected with the valve and extending from within the stand pipe through the back end of the boiler, of a steam tight tubular housing for the rock shaft within the boiler and an end stop for end of the boiler' to receive the thrust of the shaft when steam is ladmitted to the stand pipe.

Y. In a locomotive boiler in which the throttle valve is operated by a roch shaft ei;-

tending through the bach end of the boiler,

the combination with the roch shaft', of a tubular housing for the rock shaft n'ithin the boiler, a crank on the rock shaft'at the back end of the boiler, an end stop for the rock shaft at the baci; end of the boiler and a spring cushion interposed between the end stop and crank.

8. In a"` locomotive boiler in which the throttle valve is operated by a rock shaft extending through the backend of the boiler, the combinati-on with the rock shaft having a shoulder near its back end, of a gland secured tothe boiler and adapted to receive the shouldered portion of the shaft, a second giand provided with bearing metal in position to engaee the face of said shoulder and means for forcing the glands together to shaft.

9. ln a locomotive boiler 4in which the throttle valve is operated by a. rock shaft entending to the back end of the boiler, the combination` with the roel: shaft and an l operating rod connected with the rock shaft,

of a screw on the rod and a nut provided with a crank and adapted to enofage the screw to pperate the rod and hence tie shaft.

l0. In a locomotive boiler in which'the throttle valve is operated by a rod'at the back end of theboiler through intermediate connections, the-combination vwith -the rod, of a stationary screw within which the rod is permitted to slide, ascrew carried by the rod,the said screws having opposite pitches,

@in oefenen of :i stationary screw within which the yroei has a Sliding movement, e Screw carried by the rod, the said. screws having opposite pitehes,.and a nut provided with en operetinghomile und having serewthreads-of opposite itches for simultaneously engaging the sai scnews, the Said rod being provided with marks to indicate the extent of valve openingl v 12. in a locomotive boiler in which *the thi'ottle valve is operated vby a` rod :it the back end of the boiler through inteiniedifite connections, the combination with the Valve endlv rod, of .means for moving the rod :mol -IrniiksA on `the rod arranged to ooaeuwiththe velvet() indicate the extent oi' valve opening.

13. in o locomotive hoilei provided with n steiundoine and stnndvpipe extending from zi point .vitnin the boiler up into thovsteim dome, the stand pipe being. noi/ideal Withan interior chamber seperate from the' space "Within the stand pipe which communicates 'ivvithihe stx-mn pipe, a Steemight housing extending ifoin soid' interior ehmubei tothe beek endA oli* bhe boiler, a throw/le veivmen auxiliary valve arranged to cooperate with the throziie Valve and= valve operating oon-l 'neoixlons eiiiending downwei'dl V within smellv intel-iol'. chznnber and reni'wai ly--ilong' Said eteumighi lionsmg.-

ln testimony, that l claim the foregoingas my invention, l lieve signed. my name in pnesenoe of two witnesses, this twentieth dayoi Moy, 1909.-

lVitnesses: i

E. l. Romeinen, JOHN l Piumini-a. 

